Psalm 46 – Confident in God’s Protection and Power. The title of this psalm is To the Chief Musician. A Psalm of the sons of Korah. A Song for Alamoth. These sons of Korah were Levites, from the family of Kohath. By David’s time it seems they served in the musical aspect of the temple worship ( 2 Chronicles 20:19 ). From 1966 to 2015, if the order was “Send in the Marines!” chances are they arrived in a Boeing Vertol CH-46.The medium-lift helicopter, which dropped Marines on recon patrols and into battle Boeing-Vertol. 107M H-46 Sea Knight. In 1956, Vertol began studies for a new medium-lift helicopter, with the general configuration of the company's HUP-1 Retriever / H-25 Mule helicopter and based on the rotor system of the company's H-21 Flying Banana , but fitted with new lightweight turboshaft engines then in development.
WW2 Aviation. Side-by-side comparison of the Boeing CH-47 Chinook against the Boeing Vertol CH-46 Sea Knight.

The CH-47B was introduced by Boeing after a production run of 355 CH-47A's, including 2 airframes that never actually flew ( 59-04982 and airframe B-006). The hot mountainous conditions of Vietnam limited the A models performance capabilities and generated a requirement for increased. payload and better performance.

2 Ain’t no mountain high enough. Aircraft performance changes in hot and high conditions, and the Chinook is no exception. But what it can still do for operators in such an environment is particularly impressive. The US Army explains that for intra-theater payload transport in hot/high areas, the aircraft’s payload maxes out at 16,000 lb Vf8u.
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    • ch 46 vs ch 47